Updated runtile files.
diff --git a/runtime/doc/undo.txt b/runtime/doc/undo.txt
index 4b4104e..b806a31 100644
--- a/runtime/doc/undo.txt
+++ b/runtime/doc/undo.txt
@@ -1,4 +1,4 @@
-*undo.txt* For Vim version 7.3. Last change: 2010 Sep 30
+*undo.txt* For Vim version 7.3. Last change: 2010 Oct 21
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -239,7 +239,9 @@
a simple scheme that maps filesystem paths directly to undo files. Vim will
detect if an undo file is no longer synchronized with the file it was written
for (with a hash of the file contents) and ignore it when the file was changed
-after the undo file was written, to prevent corruption.
+after the undo file was written, to prevent corruption. An undo file is also
+ignored if its owner differs from the owner of the edited file. Set 'verbose'
+to get a message about that.
Undo files are normally saved in the same directory as the file. This can be
changed with the 'undodir' option.